Failure Analysis of Batteries Using Synchrotron-based Hard X-ray Microtomography

Area of Science:

• Materials Science
• Electrochemistry
• Battery Technology

Background:

• Rechargeable batteries are crucial for modern technology.
• Lithium metal anodes offer high energy density but suffer from dendrite growth, leading to premature failure.
• Lithium dendrites can also form in graphite anodes under improper charging conditions.

Purpose of the Study:

• To investigate the morphological changes within rechargeable batteries during their operational lifetime.
• To understand the mechanisms of lithium dendrite formation and propagation.
• To develop non-destructive imaging techniques for studying battery degradation.

Main Methods:

• Utilized synchrotron-based hard X-ray microtomography for non-destructive imaging.
• Applied advanced imaging to visualize internal battery structures.
• Analyzed morphological changes associated with battery cycling and failure.

Main Results:

• Successfully imaged the growth of lithium dendrites within rechargeable batteries.
• Observed other significant morphological changes impacting battery performance.
• Demonstrated the capability of X-ray microtomography to study dynamic processes inside batteries.

Conclusions:

• Synchrotron-based hard X-ray microtomography is an effective tool for studying lithium dendrite growth.
• Understanding these morphological changes is key to improving battery safety and longevity.
• This imaging approach can guide the development of more durable rechargeable batteries.